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Ionic bonding generally occurs when it is straightforward for one atom to lose one or an ext electrons and another atom to obtain one or an ext electrons. However, part atoms won’t provide up or obtain electrons easily. However they still take part in compound formation. How? there is another mechanism for obtaining a complete valence shell: sharing electrons. When electrons space shared in between two atoms, they do a bond called a covalent bond.
aramuseum.orgists commonly use Lewis diagrams to represent covalent bonding in molecule substances. For example, the Lewis diagrams that two different hydrogen atoms space as follows:
The Lewis diagram of two hydrogen atom sharing electrons looks favor this:
We have the right to use one to show that every H atom has actually two electrons approximately the nucleus, totally filling each atom’s valence shell:
Because every H atom has a fill valence shell, this link is stable, and we have actually made a diatomic hydrogen molecule. (This explains why hydrogen is among the diatomic elements.) for simplicity’s sake, it is not inexplicable to stand for the covalent bond v a dash, rather of with two dots:
Because 2 atoms space sharing one pair of electrons, this covalent link is dubbed a single bond. As another example, consider fluorine. F atoms have seven electrons in your valence shell:
These 2 atoms deserve to do the same thing that the H atom did; lock share your unpaired electron to do a covalent bond.
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Note the each F atom has a finish octet about it now:
The 2 atoms have the right to share your unpaired electron to do a covalent bond: